From BeerPongConstitution.com ...
The following guidelines should be followed in the event of the team scoring:
1. One cup made by toss equals One cup removed and drank, opposing team gets the volley.
2. Two cups made by toss equals two cups removed and drank.
3. One cup made by bounce equals two cups removed and drank.
4. Cups made by toss and bounce equals three cups removed and drank.
5. Cups made by two bounces equals four cups removed and drank.
6. In the special occurrence of both pong balls landing in the same cup.
In the event that the volleying team makes both of their pong balls into the opposing teams party cups in any arrangement be it same cup or different cups the "Bring 'em back" rule is in effect. This simply means that the volleying team is returned the pong balls, the opposing team consumes the previously hit beer cups, and the aforementioned team gets another round of volleying. However, "Bring 'em back" is invalid at the end of a match when no cups would remain to be volleyed into. This scenario would result in ether an end to the game or retaliation.
In the event that the team with the volley sinks all of their pong balls into the opposing team's cups, resulting in no cups remaining, the following guidelines should be applied:
1. Retaliation occurs when the team with the volley has hit every cup on the opposing team's side. In this event, the opposing team is allowed an opportunity to try and sink as many pong balls as they can. Once a team member has missed, they cannot shoot any more pong balls. However, if a team member makes their shot, they may continue shooting until they miss or tie. Special rules apply (see Article IV, Section 2).
2. In the result of a tie, one cup has to be placed back on the table, and both members of the team have the opportunity to volley. Game resumes as normal.
The following is a list of party fouls that can occur during the Beer Pong match; if a party foul should occur, that team making the infraction must remove one cup of beer and consume it.
* Asking for a re-rack out of turn
* When a ball, once tossed, is slapped away or interfered with by the opposing team in any way.
* If a beer is spilled.
* Arguing a rule and losing that argument due to the fact that it is clearly stated in this Constitution.
* Having a mullet (One infraction per game).
* If a majority of the people present, players and observers, believe that one team member is being overly obnoxious; a cup is to be removed.
* If a team member is having a piss-poor attitude during the match.
* Removing any cups prior to the end of a volleying round.